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异常 P 波大致可分以下几种。1.P 波时间异常:(1)时间延长(增宽)多见于心房肥大,除极时间延长,若单纯左房肥大不仅时间延长,还伴有 P 波切迹或双峰现象,亦称为“二尖瓣型 P”。凡属心房肥大所导致的 P 波时间延长,应伴有电压增高(>0.25毫伏)。若属房内传导延迟所致的 P 波增宽或有切迹,不伴有电压增高。(2)时间缩短在正常情况下除 P_(V1)可以缩至0.06秒外,其它导联的时间均应正常,
Abnormal P wave can be divided into the following several. 1. P wave time anomalies: (1) prolonged (widened) more common in atrial hypertrophy, depolarization time, if only a simple left atrial hypertrophy not only prolonged, but also accompanied by P-wave notch or bimodal phenomenon, also known as “ Mitral valve type P ”. Any prolonged atrial fibrillation caused by P wave should be accompanied by increased voltage (> 0.25 millivolts). If the room conduction delay caused by P-wave broadening or notch, not accompanied by voltage increases. (2) shorten the time under normal circumstances except P_ (V1) can be reduced to 0.06 seconds, the other lead time should be normal,